PROFESSOR EMERITUS OF BIOLOGY, AMHERST COLLEGE

NEW YORK
CHARLES SCRIBNER’S SONS
1922

Copyright, 1921, by
CHARLES SCRIBNER’S SONS
Printed in the United States of America
Published March, 1921

To
JOSEPH DÉCHELETTE
PATRIOT AND ARCHÆOLOGIST
KILLED IN BATTLE AT VINGRÉ (AISNE)
OCTOBER 3, 1914

PREFACE